ICD-10 Code E10.1 – Type 1 diabetes mellitus with ketoacidosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.1 – Type 1 diabetes mellitus with ketoacidosis
What it is
E10.1 identifies type 1 diabetes mellitus complicated by ketoacidosis. Use it when documentation shows diabetic ketoacidosis in a patient with type 1 diabetes.
Clinical signs
Clinical features vary; refer to documentation. Typical notes describe hyperglycemia with ketosis and acidosis, often with dehydration, nausea, vomiting, abdominal pain, or altered mental status.
When to use this code
Use E10.1 when the provider documents type 1 diabetes and ketoacidosis together as the active diagnosis. It fits emergency, inpatient, or outpatient records when diabetic ketoacidosis is confirmed or clearly assessed. Code the documented type 1 diabetes complication, not a nonspecific diabetes code.
Do not use for
Do not use this code for type 2 diabetes with ketoacidosis, gestational diabetes, or ketosis without documented acidosis. Check documentation if the diabetes type is unclear.
Coding tip
Verify that both type 1 diabetes and ketoacidosis are documented; if the record only says “DKA,” confirm the diabetes type before coding.